Religion, lifestyle and obesity are linked together. You do not see many Jews, Presbyterians or Protestants that are poor or obese. I think it’s because of the cultural outlook of these people. They are self-disciplined. They love learning.
Jews are the richest people in the world. Mark Zuckerberg, Larry Ellison, Bloomberg, Google’s Larry Page and others comprise the top of the list. They tend to put more value on education, entrepreneurship and ethical excellence. Of course not all are perfect. This is the same even to Protestants.
This self-discipline extends to education and diet. Poor people with poor mindset usually end up obese. But people who grew with Biblical worldview tend to possess a general worldview of future-orientation, self-control, patience and delaying of self-gratification.
What you think is what you become. A worldview that is founded on the truth produces a lifestyle that has impressive future-orientation. I live in a 3rd floor apartment. When I watch peddlers and some local tricycle drivers, I always see them throwing their garbage on the very place they are staying. Cigarettes, plastics and cups are being thrown without the prior thought of the future. Then I would realize how these people neglect the value of thinking towards the future.
Religious outlook in life influences lifestyle and diet greatly. Poor religious foundations lead to poor choices and ultimately leads to poor conditions.